Recommended Frequency:
Every week on Monday, Wednesday, Friday
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You can customize this routine to suit your needs, so anything you don't like, change or skip it!
The Norwegian 4x4 HIIT protocol is a highly effective way to improve cardiorespiratory fitness and increase VO2 max. It consists of 4 intervals of 4 minutes at 85-95% of your maximum heart rate, with 3 minutes of active recovery between intervals. This intense workout triggers metabolic stress, leading to increased lactate production and signaling for mitochondrial biogenesis. π₯πͺ
4-Minute Interval
3-Minute Active Recovery
What do I need to start this routine?